Atomic StructureHard

Question

Which of the following has the maximum number of unpaired electrons ?

Options

A.Mg2+ 
B.Ti3+
C.V3+
D.Fe3+

Solution

Mg2+ : 1s2, 2p2            n = 0
Ti3+ : [Ar] 3d1, 4s0             n = 1
V3+ : [Ar] 3d2, 4s0             n = 2
Fe3+ : [Ar] 3d4, 4s0             n = 4

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